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3 years ago

11

The ratio between the number of red and green marbles in a box is 3:7. How many marbles are in the box if there are 20 fewer red

marbles than green marbles?
PLS HELP QUICK LIKE IN 1 SECOND!!

2 answers:

natita [175]3 years ago

4 0

There are 50 marbles

mafiozo [28]3 years ago

4 0

Answer:

50

Step-by-step explanation:

difference of ratio=7-3=4

sum of ratio=3+7=10

if difference 4 total=10

if difference 20 total=10/4×20=50

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14 kg of apples cost $154.how much would 16kg cost

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We can set up a proportion, and let x be the amount 16kg would cost: 14/154=16/x. We simplify 14/154 = 1/11. Next, we cross-multiply to get (1)(x)=(16)(11), so x=176. Therefore, 16kg of apples cost $176.
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<img src="https://tex.z-dn.net/?f=5x%20%2B%209%20%20%3D%203x%20%2B%201" id="TexFormula1" title="5x + 9 = 3x + 1" alt="5x + 9 =

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Answer:

$x = -4$

Step-by-step explanation:

Take out 3x from both sides:

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